Welcome to Riverwalk OBGYN

Overall patient rating:

In 1979 Tristan Castaneda, MD started with a simple premise: Make available to every woman the health resources she needs to live a healthy, active, and long life. At the same time, educate each woman about the importance of preventative health measures. This same idea still drives us today, some 30 years later. The track record we’ve accumulated over the years speaks to our commitment to patients, their families, and the community at large. Both our medical and office staffs are second to none, who genuinely take an interest in individual patient’s needs. We think you’ll notice the difference immediately when you step foot inside our doors. We’d love to see you today to map out a health and wellness plan that’s tailored to your health history and needs.

About Our Practice

  • Providers

  • Services

  • Links And Forms

  • Locations

  • Contact Us

  • Alka Arya Degaetano

    DO
  • Ricardo Munoz

    MD
  • Stephanie Schaefer

    MD
  • Christina Simpson

    MD
  • Heather Williams

    MD

We Provide The Following Services

  • Obstetrics + Reproduction
  • Pregnancy Care and Delivery
  • Contraception
  • Ultrasound and Imaging
  • Gynecology + Wellness
  • Annual Exams
  • Menopause
  • Urogynecology

Riverwalk OBGYN: San Antonio Office

  • Monday: 8:30AM - 5:30PM
  • Tuesday: 8:30AM - 5:30PM
  • Wednesday: 8:30AM - 5:30PM
  • Thursday: 8:30AM - 5:30PM
  • Friday: 8:30AM - 5:30PM

Send Us a Message

    Patient Reviews

    Overall patient rating for Riverwalk OBGYN:

    Gynecological Problem Visit

    He listens to his patients

    Pap Smear

    She is always in a happy mood and truly listens to any concerns.

    Abdominal Pain

    NP was pleasant, and noted my concern in a professional manner.

    Annual Well Woman Exam

    I have gone to Riverwalk women's health for many years. My GYN was Dr. Heather Williams. Loved and miss her. She highly recommended Dr. Arya!!! Thank you

    Obstetrical (Pregnancy) Ultrasound / Sonogram

    The staff is always very kind and helpful, the office is well maintained, and the visits go well. However, the wait times often run up to 1hr plus and the waiting room is clearly packed with patients where many are waiting for the same doctor and in the same time frame of waiting. It seems appointment times may be booked way too close together and I am not sure why as it creates a very unpleasant experience, that would otherwise be a very pleasant without that hurdle. In fact, I consider changing doctors each time I have to go through it (which has been every routine visit to date).

    Annual Well Woman Exam

    Dr Schaefer took her time prior to the physical exam to see how I felt, as well as my overall health. She is very conscientious in her approach and always has my best interests in her suggestions for menopausal HRT .

    Annual Well Woman Exam

    Dr Arya has such great bedside manner. She takes the time to listen and engages w her patients. She provides great feedback and performs exams gently and w guidance.

    Annual Well Woman Exam

    I’ve been seen by the same doctor for many years and was glad to be able to see her again @ this new location. The staff are very helpful and very friendly.

    Annual Well Woman Exam

    Dr. Munoz is & has always been so patient & hears & understands & assists quickly any issues he's the best and has been for the past 31yrs I've had him as my obgyn delivering my 2 kids.

    Annual Well Woman Exam

    Cristina simpson provides amazing care and service! Especially with birth/delivery